Include index of association calculation and discussion

[zkamvar]

We initially did not include this because of the small sample sizes, not—as the reviewer suggested—because we did not trust our sampling scheme. However, the editor and reviewer wants us to include this measure, so we will. However, we will note in the manuscript that the question of recombination should not rest purely on the results of this measure, as is often done in the literature, but should be the synthesis of all the diversity measures and knowledge of the pathogen ecology.

• include index of association in table 2
• Cite Kamvar 2016 (http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/dz010t67t) in addition to Milgroom 1996 and Tibayrenc 1996

Milgroom, M. G. (1996). Recombination and the multilocus structure of fungal populations. Annual Review of Phytopathology, 34(1), 457–477.

Tibayrenc, M. (1996). Towards a unified evolutionary genetics of microorganisms. Annual Review of Microbiology, 50(1), 401–429. https://doi.org/10.1146/annurev.micro.50.1.401